diff --git a/pylot/core/pick/utils.py b/pylot/core/pick/utils.py
index 20271084..8d145944 100644
--- a/pylot/core/pick/utils.py
+++ b/pylot/core/pick/utils.py
@@ -1477,6 +1477,8 @@ def getQualityFromUncertainty(uncertainty, Errors):
     elif uncertainty > Errors[3]:
         quality = 4
 
+    return quality
+
 if __name__ == '__main__':
     import doctest